Belt tightener and shifter



P. D. BARTON. BELT TIGHTENBR AND SHIPTBR.

No. 594,622. Patented Nov..30, 189'7v l VMM d Mm minimum@ llumumvi Nrrn STATES PEMBROKE D. I-IARTON, OF PHILADELPHIA, PENNSYLVANIA.

BELT TIGHTEN ER ANDV SHIFTER.

SPECIFICATION forming part of Letters Patent N0. 594,622, dated November 30, 1897.

Application led June 22,1897. Serial No. 641,835. (No model.)

To all whom t may con/cern:

Be it known that I, PEMBROKE D. HARTON, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Belt Tighteners and Shifters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the iigures Vof reference marked thereon, which form a part of this speciiication.

My invention relates to that class of inventions that have for their object the shifting, tightening, and holding of belts in place on cone-pulleys.

My invention consists in interposing between the two cone-pulleys a screw-threaded shaft which is held in position by any suitable means in the sides of the machine, and on this shaft is located a nut carrying one rigid and one jointed arm, the two having adj ustable ends that carry the rollers, the latter having webs between whichthe belt or strands are kept in alinement. The screw-shaft has means whereby the nut carrying the arms and rollers moves the belting back and forth over the face of the cone-pulleys, so that any desired speed may be attained.

I now proceed to give a description of the invention in such a Way that it may be made i and constructed by those skilled therein and throughout the several iigures of the drawings.

The cone-pulleys 7 8 are suitably supported on shafts 5 in brackets 1, 2, 3, and 4, said brackets 1 2- and 3 i being respectively connected together by side castings 9 10, each of which has an elongated opening 11 on its at 17. The adjustable ends 16 carry the rollers 19 22,which have their faces separated by webs 2O into as many parts as strands to be used.

It will be seen from the drawings that the roller 22 acts on the inside of the belt or belts close to the cone 8, while the roller 19 lies on the top of the belting close to the cone 7. This arrangement always insures the belting 6 moving true over the face of each of the said cones, and by the turning of the handwheel 25 to the right or left the rollers 19 22 will cause the belting to move to one end or the other of the cones. The rollers prevent the non-slipping of the belting.

Thisy construction I have found to be advantageous in machines whereV changeable speed is required, and with my device the speed of any machine can Abe changed by the operator Without leaving his position.

I have illustrated that form of device that I think best; but I do not wish to be limited to the precise construction herein shown, as such changes as the substitution of a number of separate rollers could be used to advantage instead of the one large one shown.v Again, there could be a guide with webs on its under face that would also accomplish the same result.

1. In a belt tightener and shifter for conepulleys, the combination of a threaded shaft adjustably secured to the sides of the machine with means for operating the same, a nut on said shaft having two arms each provided wit-h an adjustable end and with a roller, all substantially as and for the purposes set forth.

2. In a belt tightener and shifter for conepulleys, the combination of an adjustable threaded shaft interposed between the conepulleys, a nut on said shaft having two arms IOO one of which is swiveled, each provided with shaft carrying two arms each provided with n.11 adgustable end carrying a roller or-guide a roller or guide, substantially as described. To with two or more webs, all substantially as In testimony whereof I affix my signature described. in presence of two witnesses.

3. In :L belt tightener and shifter, the coni-A PEMBROKE D. IIARTON. bination with the Cone-pulleys and adjust- NVitnesses: able threaded shaft arranged at :m angle to FRANCIS J. SCANLAN,

the shafts of the pulleys, of L nui on said .I OHN J. MINNICK. 

